Posted on 12/29/2021 5:57:37 AM PST by Red Badger
A summary of decades of research on a rather 'out-there' idea involving viruses from space raises questions on just how scientific we can be when it comes to speculating on the history of life on Earth.
It's easy to throw around words like crackpot, rogue, and maverick in describing the scientific fringe, but then papers like this one, from 2018, come along and leave us blinking owlishly, unsure of where to even begin.
A total of 33 names were listed as authors on this review, which was published by Progress in Biophysics and Molecular Biology back in August 2018. The journal is peer reviewed and fairly well cited. So it's not exactly small, or a niche pay-for-publish source.
Science writer Stephen Fleischfresser goes into depth on the background of two of the better known scientists involved: Edward Steele and Chandra Wickramasinghe. It's well worth a read.
For a tl;dr version, Steele is an immunologist who has a fringe reputation for his views on evolution that relies on acquiring gene changes determined by the influence of the environment rather than random mutations, in what he calls meta-Lamarckism.
Wickramasinghe, on the other hand, has had a somewhat less controversial career, recognized for empirically confirming Sir Fred Hoyle's hypothesis describing the production of complex carbon molecules on interstellar dust.
Wickramasinghe and Hoyle also happened to be responsible for another space biology thesis. Only this one is based on more than just the origins of organic chemistry.
The Hoyle Wickramasinghe (H-W) thesis of Cometary (Cosmic) Biology makes the rather simple claim that the direction of evolution has been significantly affected by biochemistry that didn't start on our planet.
In Wickramasinghe's own words, "Comets are the carriers and distributors of life in the cosmos, and life on Earth arose and developed as a result of cometary inputs."
Those inputs, Wickramasinghe argued, aren't limited to a generous sprinkling of space-baked amino acids, either.
Rather, they include viruses that insert themselves into organisms, pushing their evolution into whole new directions.
The report, titled "Cause of Cambrian Explosion – Terrestrial or Cosmic?", pulls on existing research to conclude that a rain of extra-terrestrial retroviruses played a key role in the diversification of life in our oceans roughly half a billion years ago.
"Thus retroviruses and other viruses hypothesized to be liberated in cometary debris trails both can potentially add new DNA sequences to terrestrial genomes and drive further mutagenic change within somatic and germline genomes," the authors wrote.
Let that sink in for a moment. And take a deep breath before continuing, because that was the tame part.
It was during this period that a group of mollusks known as cephalopods first stretched out their tentacles from beneath their shells, branching into a stunning array of sizes and shapes in what seemed like a remarkably short time frame.
The genetics of these organisms, which today include octopuses, squid, and cuttlefish, are as weird as the animals themselves, due in part to their ability to edit their DNA on the fly.
The authors of the paper make the rather audacious claim that these genetic oddities might be a sign of life from space.
Not of space viruses this time, but the arrival of whole genomes frozen in stasis before thawing out in our tepid waters.
"Thus the possibility that cryopreserved squid and/or octopus eggs, arrived in icy bolides several hundred million years ago should not be discounted," they wrote.
In his review of the paper, medical researcher Keith Baverstock from the University of Eastern Finland conceded that there's a lot of evidence that plausibly aligns with the H-W thesis, such as the curious timeline of the appearance of viruses.
But that's just not how science advances.
"I believe this paper justifies skepticism of the scientific value of stand alone theories of the origin of life," Baverstock argued at the time.
"The weight of plausible, but non-definitive, evidence, great though that might be, is not the point."
While the idea is as novel and exciting as it is provocative, nothing in the summary helps us better understand the history of life on Earth any better than existing conjectures, adding little of value to our model of evolution.
Still, with solid caveats in place, maybe science can cope with a generous dose of crazy every now and then.
Journal editor Denis Noble concedes that 'further research is needed', which is a bit of an understatement.
But given the developments regarding space-based organic chemistry in recent years, there's room for discussion.
"As space chemistry and biology grows in importance it is appropriate for a journal devoted to the interface between physics and biology to encourage the debates," said Noble.
"In the future, the ideas will surely become testable."
Just in case those tests confirm speculations, we recommend being well prepared for the return of our cephalopod overlords. Who knows when they'll want those eggs back?
This research was published in Progress in Biophysics and Molecular Biology.
A version of this article was first published in August 2018.
I’ve never claimed to be a diplomat. That’s someone who can say, “When I look at you, time stands still.” I’ve always been the one who says, “You’ve got a face that could stop a clock.”
So my apologies, everyone, and to your wife and in-laws as well, ArGee. The sad thing is, I haven’t improved with age and CFIDS is always lurking to make sure I don’t.
I’ll just sign off for the night, now, because there’s no sense in staying around, in case my foot and mouth disease gets reactivated.
w000t!
Good morning, everyone. Happy Twosday!
The days keep rolling by.
F-i-L made his own coffee yesterday. Mrs. ArGee went over and made lunch. Her big task is getting her mom moved to a rehab facility. She’s loving the medial bureaucracy.
NOT.
For those still Wordling. (Is that how you spell that?)
Wordle 220 4/6
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Happy Tiwsday. Everyone loves medical bureaucracy, right?
We’re all fine here, as far as I can tell. I don’t think I’ve seen Patrick yet.
W000t!
First one on the new thread! Woo-hoo!
G’orning. I’m leaving for Weight Watchers in a few minutes.
Pretty little floof.
Good morning.
I hope you slept well.
I woke up at 0500 and then turned over and went back to sleep for two more hours.
Good morning. I hope you feel more rested now. I slept pretty well. Jake helped me get warm, but he left at some point, coming back when he heard the coffee part start to tell me it was time to get up and let cats out.
Best wishes for your wife in navigating that mess.
I messed up in not realizing that one of the needed vowels was still in play...
Wordle 220 5/6
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Thanks. I never feel “rested” but at least I don’t feel so on-edge.
I think I’ll try to clear out one more box and then call it a day as far as owrk is concerned.
It’s going to be cold again tonight, in the low 20s, and I don’t look forward to that.
Oops! I just realized I haven’t made my bed. Maybe I do that before I do anything else! LOL! My bad!
DP makes the bed sometimes. It depends on what Jake is doing.
It took me five tries as well, Z!
I’m in good company!
I don’t like to go without making mine. When I don’t make it, it feels like I’m heading for a depression and I don’t want to go there, so I always try to make it. Yesterday, because I changed the sheets, it took me three tries. Typical for a wash day.
It will be made, soon. I’ve been putting things in there to be put away, “later,” so it will have to happen before I go to bed. Whenever that is!
I’m going to take Kathleen to the library to pick up a book, and I’ll drop some mail off at the post office. I forgot to put it in the box this morning.
All the byos have disappeared or died. Maybe Patrick took them somewhere.
👍🏻
G'daft ernoon, y'all.
Oh, wow. My niece and nephew are going through the same frustrating process. Prayers up that the issues are quickly resolved.
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